An Improved Iterative Receiver Scheme for Turbo-BLAST System with Anti-gray Mapping

In MIMO communication system the conventional Turbo-BLAST receiver using Gray mapping converges slow. For this reason, an improved Turbo-BLAST scheme with Anti-Gray mapping is proposed in this paper. Research has shown that the iterative receiver using new scheme outperforms the convention alone and obtains a faster convergence rate. Also, an improved receiver based on soft interference cancellation and MMSE filtering is proposed: The posterior information not extrinsic information is fed back from outer decoder to inner detector. A better performance is attained without increasing the computational complexity. Simulation results and Extrinsic Information Transfer (EXIT) chart analysis all demonstrate this.